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FAIR VALUE MEASUREMENTS
12 Months Ended
Dec. 31, 2021
Fair Value Disclosures [Abstract]  
FAIR VALUE MEASUREMENTS FAIR VALUE MEASUREMENTS
The Company measures certain financial assets and liabilities at fair value on a recurring basis, including cash equivalents, marketable securities, and the free shares asset. Fair value is determined based on a three-tier hierarchy under the authoritative guidance for fair value measurements and disclosures that prioritizes the inputs used in measuring fair value as follows:
Level 1: Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities;
Level 2: Quoted prices in markets that are not active or inputs which are observable, either directly or indirectly, for substantially the full term of the asset or liability; and
Level 3: Prices or valuation techniques that require inputs that are both significant to the fair value measurements and unobservable (i.e., supported by little or no market activity).
The fair value measurements of the Company’s cash equivalents, marketable securities, and the free shares asset are identified at the following levels within the fair value hierarchy (in thousands):
December 31, 2021
Fair Value Measurements
TotalLevel 1Level 2Level 3
Assets:
Cash equivalents:
Money market funds$119,919 $119,919 $— $— 
Total119,919 119,919 — — 
Marketable securities:
U.S. government-sponsored entity debt securities30,614 — 30,614 — 
Commercial paper securities105,757 — 105,757 — 
Corporate debt securities33,682 — 33,682 — 
Certificates of deposit45,091 — 45,091 — 
Asset-backed securities70,701 — 70,701 — 
Total285,845 — 285,845 — 
Total cash equivalents and marketable securities$405,764 $119,919 $285,845 $— 

December 31, 2020
Fair Value Measurements
TotalLevel 1Level 2Level 3
Assets:
Cash equivalents:
Money market funds$53,165 $53,165 $— $— 
Total53,165 53,165 — — 
Marketable securities:
U.S. government-sponsored entity debt securities257,298 — 257,298 — 
Commercial paper securities213,533 — 213,533 — 
Corporate debt securities59,574 — 59,574 — 
Certificates of deposits12,311 — 12,311 — 
Asset-backed securities17,908 — 17,908 — 
Total560,624 — 560,624 — 
Total cash equivalents and marketable securities$613,789 $53,165 $560,624 $— 
Free shares asset$70 $— $— $70 
Cash Equivalents and Marketable Securities
The Company generally classifies its marketable securities as Level 2. Instruments are classified as Level 2 when observable market prices for identical securities that are traded in less active markets are used. When observable market prices for identical securities are not available, such instruments are priced using benchmark curves, benchmarking of like securities, sector groupings, matrix pricing and valuation models. These valuation models are proprietary to the pricing providers or brokers and incorporate a number of inputs, including in approximate order of priority: benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers and reference data including market research publications. For certain security types, additional inputs may be used, or some of the standard inputs may not be applicable. Evaluators may prioritize inputs differently on any given day for any security based on market conditions, and not all inputs listed are available for use in the evaluation process for each security evaluation on any given day.
Free Shares Asset
As a result of the July 20, 2018 Share Purchase Agreement (“Sangamo France SPA”) to acquire Sangamo France (see Note 5 — Acquisition of Sangamo France), the Company entered into arrangements with the holders of approximately 477,000
“free shares” of Sangamo France pursuant to which the Company had the right to purchase such shares from the holders (a call option) and such holders had the right to sell to the Company such shares from time to time through mid‑2021 (a put option). As of December 31, 2021, the Company had purchased all of the 477,000 free shares for an aggregate cash payment of approximately $1.1 million, upon exercise of the put options. As of December 31, 2021, there were no free shares outstanding subject to purchase by the Company. The fair value of the free shares’ asset was $0.1 million at December 31, 2020.
Free Shares valuation assumptions:December 31, 2020
Sangamo stock price (USD)$15.61 
Sangamo France stock price (EUR)3.85 
EUR/ USD exchange rate0.82 
Estimated correlation between Sangamo and Sangamo France stock prices100.0 %
Sangamo stock price (USD) volatility estimate88.9 %
Sangamo France stock price (EUR) volatility estimate88.9 %
EUR/ USD exchange rate volatility estimate6.3 %
Risk free rate and cost of debt by expected exercise dateVaries